J01203+3950

FBS0117+396  ·  Culpan knownhsd

χ²/N = 0.99

Spectrum

shaded: the intervals the fit used ·  │ a cancelled pixeldrag on either panel to zoom · dbl-click or Esc to reset · arrows to pan

The whole reduced spectrum above, the region marked on it below. Shaded bands are the intervals the fit used; a tick under the axis marks a pixel the rejection mask cancelled.

Line-profile fit — Bamberg

profile fit on the Bamberg grid
Observed spectrum in black, model in red, offset by line. Balmer series left, helium right.

Results and provenance

Fit — Bamberg

Teff [K]27875 ± 234
log g5.483 ± 0.037
log n(He)/n(H)-2.887 ± 0.136
reduced χ²0.995 over 639 points
radial velocity-25.0 km s−1
resolution (FWHM)2.50 Å
lines fitted12
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 18:25:29

Fit — Lei (TLUSTY)

Teff [K]28900 ± 210
log g5.350 ± 0.020
log n(He)/n(H)-2.840 ± 0.090
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-57399-M31021N40B1_sp10-223.fits.gz

Gaia astrometry

Gaia DR3 source371711041304831616
parallax [mas]0.5692 ± 0.0462
G15.392
Gabs4.229
μα [mas/yr]1.419
μδ [mas/yr]-1.515
l, b128.948, -22.684

Published (Culpan et al. 2022)

class (Culpan)sdB+dM
class (SIMBAD)sdB
Teff [K]28500 ± 100
log g5.42 ± 0.01
log y-3.00 ± 0.10
reference2015A&A...577A..26G

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-0.41-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-0.36-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-0.34-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.33-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.32-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.32-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.32-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.31-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-0.39-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-0.37-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.34-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-0.41-15.0, 15.05.1-15.0, 15.0